7-Bit Programmable, Multi-Phase Mobile, CPU Synchronous Buck Controller

The ADP3207C is a high efficiency, multi−phase, synchronous, buck−switching regulator controller optimized for converting notebook battery voltage into the core supply voltage required by high performance Intel processors. The part uses an internal 7−bit Digital−to−Analog Converter (DAC) to read Voltage Identification (VID) code directly from the processor that sets the output voltage. The phase relationship of the output signals can be programmed to provide 1−, 2−, or 3−phase operation, allowing for the construction of up to three interleaved buck−switching stages.

Features

• 1−, 2−, or 3−Phase Operation at Up to 750 kHz per Phase

• 7 mV Worst−Case Differential Sensing Error Overtemperature

• Input Voltage Range of 3.3 V to 22 V

• Interleaved PWM Outputs for Driving External High Power MOSFET Drivers

• Enhanced PWM FlexMode for Excellent Load Transient Performance

• Automatic Power−Saving Modes Maximize Efficiency During Light Load and Deeper Sleep Operation

• Soft Transient Control Reduces Inrush Current and Audio Noise

• Active Current Balancing Between Output Phases

• Independent Current Limit and Load Line Setting Inputs for Additional Design Flexibility

• Built−In, Power−Good Masking Supports VID OTF

• 7−Bit Digitally Programmable 0.3 V to 1.5 V Output

• Overload and Short−Circuit Protection Latchoff Delay

• Built−In, Clock Enable Output Delays CPU Clock Until CPU Supply Voltage Stabilizes

• Current Monitor Output Signals the Total Output Power of the Buck Converter

• This is a Pb−Free Device

Applications

• Notebook Power Supplies for Next Generation Intel® Processors